Molding-machine.



No. 868,957. PATENTED 00122, 1907. c. w. WOODS. MOLDING MACHINE.

APPLIG'ATION FILED OCT. 26.1906.

INVENTOR 69 24% )k-flm WYWA;

AT RNEY WITNESSES:

No. 868,957. PATENTED QCT. 22. 1907.

- G. W. WOODS.

MOLDING MACHINE. w

APPLIOATION FILED O0T.26.1906.

2 SHEETS-SHEET 2.

WITNESSES: INVENTOR M, 77- 01701.4. WwfWMz/r BY W 27%; ATTZ NEY CHARLES W. WOODS, OF ELIZABETH, NEW JERSEY.

MOLDIN G-MACHIN E. I

Specification of Letters Patent.

, Patented Oct. 22, 1907.

Application filed October 26,1906. Serial No. 340,679-

- as will enable others skilled in the art to which it ap pertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention is designed to provide a molding machine that will compress the sand in a mold, pack it well around the pattern, and release the pattern from the mold ina smooth manner, and to vibrate automatically the pattern boards and the platforms on which they are supported, so that the sand in the mold will be evenly distributed and will form a smooth surface for casting;

The invention is further designed to provide a molding machine that is provided with side bearings that go to make up a more rigid structure, when the machine is in operation, and to form a more even mold by reason of maintaining the patterns flat, when they are inserted in the sand.

A further invention is a mold box to be used in the molding machine that allows an inner casing of metal to be slid in and out of it during the process of molding, and this inner lining is supposed to hold the sand, and it is thus possible to use one mold box for any number of linings, and the linings are then stacked up awaiting the molders operation.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a side view of the molding machine before any pressure has been applied to the mold, and Fig. 2 is an end; view of the same. Fig. 3 is a section of a mold and the inner lining, and Fig. 4 is a section on line 4, 4, in Fig. 1. Fig. 5 is a drawing on a reduced scale of the face of one of the pattern boards. Fig. (3 is a side view of an attachment for automatically tripping the operating means, of the vibrator, on the upper pattern board or platform that supports the pat tern board, andFig. 7 is a side View of'an automatic attachment for operating the vibrator of the lower pattern at a predetermined time.

In the drawings 10 is the base, as ordinarily made for molding machines of this kind, and 11 is a cylinder, operated by pneumatic pressure usually, that contains a plunger that reciprocatcs and thus lifts and lowers a platform 12. On either end of the base 10 are the swiveled bearings 13 in which are arranged the uprights 14 which support, across the top, a beam 15. To the beam 15, in any suitable manner, is secured a pattern board 16, and another pattern board 17 is secured to the platform 12. On theboard 17 is arranged a suitable pattern 22, and on the board 16 is arranged a second set of patterns 22. It will be seen that when these patterns are impressed in a mold, the succeeding mold can be set over the mold that has been made before, and the adjoining faces will form a complete mold for casting the article required.

Projecting up through the platform 12, and also through the pattern board 17, at any suitable point, but preferably at the four corners, are the rods 23, each of which slides in a sleeve 24 on the platform 12, and the bottoms of the rods 23 are supplied with links 25, each of these links operating, by means of a bell-crank 26, a pair of bars 27 on each side of the machine. bell-cranks '36 are pivoted on suitable supports, and a rod running act as the machine, through the supports, causes all four rods 23 to work at the same time. Gonnected on one end to one of the bell-cranks 26, and operated thereby, is a bar 28 that is provided with a pair The of slots, one of which, 29, is normally out of engagement,

and another is normally in engagement with a bolt 30 on the machine frame, these slots thus locking the bar 28 in either one of two positions. On the cross rod 33, of one pair of bell-cranks 26, is a lever 32 provided, on its end, with the handle 31, and when the-operator grasps this handle 31, he also incloses, in his fingers, the end 34, of a rod 35, which releases the bar 28 from the bolt 30 and permits the free riding of the rods 23, caused by the manipulation of the handle 31.

In Fig. 1 is shown the machine before the molding operation begins, and the rods 23 are shown raised above the pattern board 17, and in this position they tend to receive a mold box 18, this mold box being provided with a pair of pins provided with ends 19 arranged to slide in the opposed mold boards to hold the mold box, and to center it in one position. Secured by friction, caused by the setscrows 20, is an interior box or lining 21 which is preferably made of metal,

and the pressure of the screws 20 is sufficient to hold its lining 21, but not tight enough to prevent the mold box 18 and the lining 21 from being slid together to the position shown in Fig. 3, when pressure is applied by means of the machine.

When the machine is started, in the usual way, the

platform 12 ascends, and the patterns 22% and 22 are firmly embedded in the sand contained in the box, the

interior lining 21 having been dropped, as in Fig. 1, and

the sand havingbeenleveled off to the top of the mold box. When this lining 21 is pushed up into the mold box 18, there is a smooth and tight impress made in the sand. To cause a smooth surface and a ready release by the sand of the pattern, vibrators are installed on the upper and lower platforms of the machine, these vibrators being operated automatically or manually at the opportune times. I show, in Figs. 2 and 6, the vibrator 36, of any usual pattern as now employed in machines of this kind, and to the platform 12 is arranged a bar supporting a roller 37, and when the platform 12 has risen high enough to have the patterns engaging the sand in the mold, the roller 37 engages the nose 38 on the bar 39 which has a spring to it, and is fastened to the machine as at 40. This pressing ver of the bar 39 operates the valve stem 41 of a valve 42, and allows the pneumatic'pressure to pass through the hose 43 and operate the vibrator 36. This vibration is timed to take place immediately before the upper patterns 22 engage the sand, and to continue, and cease immediately after the pattern leaves the sand.

When the platform 12 is descending, the mold box 18 and the inner metallic lining 21, being flush, it is desired that they lie flat on the pattern board 17 until the descent is finished, and to allow this the rods 23 are dropped by pushing over the handle 31 and, a lever 32, as hereinbefore described, and when the descent is completed,the mold box 18 is not raised as shown in Fig. 1. After the operation of the machine isfinished, however, and the descent is complete, the lever3l is again thrown back to the position shown in Fig. 1, and the mold box 18 and its innerlining 21 are raised together and in alinement, being held with the screws 20, and while the box is being thus manually raised from the lower pattern board, the lower platform is vibrated, this being caused by a vibrator 44, shown in Fig. 1, the vibrator receiving its power through a pipe 45, and a valve 46, the valve receiving, from the pipe 47, the hydraulic pressure from a main supply pipe 48. When the mold box is raised, by means of the handle 31, the handle 51 can be operated which will serve to throw a nose 50 to push in the stem 44 of the valve 46, and I can also install a bar 52 pivotally secured to the handle 51 which has a foot piece 53 sliding in the bearing 54, it being understood, of course, that the foot piece 53 is far enough below the bearing 54 to not cause the operation of the foot piece when the platform ascends. It will be evident, from this, that when the mold box and its lining are raised, the platform 12 and consequently the lower pattern is vibrated. If desirable, I can install, instead of this manually operated device, one as shown in Fig. 7, in which the vibrator 44, on the lower platform of the machine is installed as shown, and on the platform 12 is secured a depending rod 55 whichhas pivoted at 56 a lever, the end of which, 57, is weighted, and it has a cut-away portion 58 so that when the platform 12 ascends, the roller 59 passes over the raised portion 60 of the spring bar 61 which is fastened to the frame, as at 62. The bar 61 is not operated because the lever tilts, this tilting being permitted by the cut-away portion 58, and therollerascends to the positionas shownat 63, without the operation of anything but the tilting lever. On the descent however, when the roller 59 engages the projection 60, the nose 64 binds on the rod 55, and the lever is locked against any tilting, the spring bar 61 is pushed in, the stem 65 operates to open the valve 66, and the pipe 67 is free to receive pressure, pneumatic or otherwise, from the pipe 68, which in turn is connected with the main supply pipe. This provides for an automatic operation of the vibrator of the lower platform of the machine.

I prefer to secure the patterns to the boards by means of the devices shown in Figs. 1 and 5, in which the pattern boards are supplied with recesses, as 68, these recesses being adapted to receive the secondary boards carrying the patterns, and the screws 69 bearing, from two sides, againstthe secondary board tightly bind or clasp the secondary board in the pattern board.

When the mold box is in place on the machine, and the patterns are in position, the beam 15 is pulled over the top of the machine by means of the handle 15, and to cause a steadier movement of the machine, and to guard against any slanting or uneven impressing of the patterns in the sand, and to therefore compel a positive vertical adjustment, 1 provide each of the bars 14 with a sleeve 70, the sleeve 70 being tightly clamped to the bar by any well known means, but preferably by the screws 72, and the sleeve 70 having a projecting web which provides a bearing for a roller 71 so that when the machine is in operation, this roller bears agaipst the outside surface of a block 12, on each side of the platform 12, so as to prevent any longitudinal movement of the bottom platform after it has started to rise. The blocks 12 in turn are each provided with a pair of rollers 73 which engage the surfaces 74 of the projecting ribs of the sleeve 70, this providing against any transverse movement of the bars 14 and consequently the upper pattern board and pattern.

The machine thus described, embodies a quick operating device, and one that can be easily manipulated, that provides a greater output than the old style of mold machine, and that also makes a cleaner mold and a more even impress into the sand.

Another time and labor saving feature is the automatic operation of the vibrators and of the grouping of the handles of.- the lower vibrator, and the foot piece along with the handle for operating the rods for raising the mold box from the lower pattern board.

Having thus described my invention, what I claim is:-

1. A molding machine comprising a. base, a cylinder, 21 platform, a head pivoted on the base, a mold box, a casing sliding in the box, an adjustable friction device bearing on the casing, and means for lifting the mold box from the platform.

2. A molding machine comprising a-base, a reciprocating platform, a fixed platform, patterns on the opposed faces of the platforms, a mold box with a sliding casing therein and means for engaging the mold box to lift it from its casing, and a friction device for maintaining the casing in the mold box.

3. A molding machine comprising a base, a reciprocating platform, a pattern on the reciprocating platform, a fixed .platform, a pattern on the fixed platform, a vibrator on each platform, a mold box and patterns between the platforms, means operated by the movable platform to vibrate the fixed platform when the platforms are in their operative positions, and means for vibrating the movable platform when the platforms are being separated.

4. A molding machine comprising a base, a reciprocating platform, a pattern on the reciprocating platform, a fixed platform. a pattern on the fixed platform, a vibrator on each platform, means actuated by the raising of the reciprocating platform for operating the vibrator on the fixed platform when the platforms are pressed together, and means for operating the'vibrator on the movable platform when the movable platform has completed its return stroke.

A molding machine comprising a base, a reciprocating platform, a pattern on the reciprocating platform, a fixed platform, a pattern on the fixed platform, a vibrator on the fixed platform, a tube conveying pressure to the vibrator, a tripping mechanism on the base, and a valve secured to the base and arranged in the tube, the tripping mechanism opening the valve when the platforms are pressed together.

6. A molding machine comprising a base, a reciprocating platform, a pattern on the reciprocating platform, a fixed platform, a pattern on the fixed platform, a vibrator on the fixed platform, a pipe leading to the vibrator, a valve in the pipe and supported on the base, a spring arm to engage the valve, and a roller on the reciprocating platform to engage the spring arm, wherebythe valve is opened to operate the vibrator.

7. A molding machine comprising a base, a reciprocating platform, a fixed platform, a mold box on 'the reciprocating platform, rods arranged to slide in the reciprocating platform and engage the mold box, bars for connecting the rods to operate them simultaneously, a lever to operate the bars, a bar connected to the first bars having a pair of slots in its edge, a stop on the base for the engagement of the slots, and an arm for raising the second bar, the arm sliding on the lever.

8. A molding machine comprising a base, a cylinder, a platform reciprocating on the cylinder, a mold box on the reciprm-ating platform, a pair. of rods pivoted on the base, a

platform on the upper ends of the arms, a pattern on the platform, a guide on each rod having a roller thereon, a block on each end of the reciprocating platform, the block receiving the roller of the guide, and a pair of rollers on each block to engage the two sides of the guide when the reciprocating platform is raised.

9. A molding machine comprising a reciprocating platform, a fixed platform, rods sliding in the reciprocating platform and adapted to be projected therefrom, and means for operating and locking the rods, in combination with a mold box arranged to be raised from the reciprocating platform by the projecting rods, an inner lining in the mold box arranged to rest on the platform, and friction devices between the lining and the box.

In testimony, that I claim the foregoing, I have hereunto set my hand this th day of October, 1906.

CHARLES W. WOODS.

Witnesses RALPH LANCASTER,

E. A. PHLL. 

